Shadow Graph

Shaddow Graph is a time tested, cost effective, solution for non-contact measurement. Shaddow Graph machines also commonly known as Optical Comparotors are simple to use, yet have excellent capacity to satisfy a wide range of applications and measuring requirements. Optical Comparitors from Starrett boast precision optics, superb lighting and a highly accurate workstage which combine to ensure bright, sharp images and exceptional accuracy. Horizontal models work well with parts that need to be fixtured, held in a vice, or on centers.

HB400 Horizontal Benchtop Optical Comparator

Features & Specifications

  • Available with a choice of a MetLogix M2 or several Quadra-Chek control systems
  • Distinctive new styling
  • Fully usable 400mm screen diameter
  • Large measuring travel: 300mm X-axis, 150mm Y-axis
  • Exceptionally stable, all metal construction for optimum performance and accuracy
  • High precision workstage with 540mmx127mm top plate, with two machine slots for easy fixturing
  • Stage weight capacity: 100 lbs
  • Quick action change lens system
  • 5x, 20x, 25x, 31.25x and 50x lenses available
  • Dual mirror design for vertically correct image
  • Digital protractor for accurate angle measurements, 1’ resolution
  • ±15° workstage helix adjustment for accurate thread form inspection
  • Fine adjustment on all axes, plus zero backlash, fast traverse mechanism on the X-axis
  • Fully retractable fiber optic surface illumination with heavy-duty shielding
  • Automatic edge detection option
  • Motorized and CNC workstage options
  • Optional OV2 quick change video camera with up to 200x magnification text




VF600 Vertical Floor Standing Optical Projector

  • Fully usable 600mm diameter screen.
  • Screen angled at an optimum 30° to give bright, easily viewed image, and allowing easy tracing or overlay work.
  • Choice of two workstage size options with manual, motorised or CNC control.
  • Fast traverse, quick release mechanism on X and Y Axis.
  • Supplied complete with full canopy and curtains.
  • Single lens mount or 3-lens quick change turret using silo system for maximum lens protection.
  • Available with the full range of Quadra-Chek readout systems.
  • Electronic digital protractor.
  • Comprehensive range of multi-element precision ground lenses.
  • 4Large range of accessories available.
  • 4Lamp mounted helix facility.



  • Screen Diameter: 600mm with precision cross lines, calibration markings and overlay clips.
  • Workstage: Top plate - 400mmx225mm, Measuring Travel: 200mmx100mm
  • Workstage Capacity: 30kg maximum (Evenly distributed)
  • Illumination: Profile - Fan cooled, 150w halogen with yellow/green filter, Surface - Fan cooled 100w lamp/fibre optic system.
  • Measurement/display systems: Linear - Heidenhain scales (0.001mm resolution). Simple DRO or Quadra-Chek readout systems with edge sensing option. Angle - Digital protractor (1 minute resolution). Quadra-Chek Q-Axis.
  • Lenses: x10, x20, x25, x 311/4, x50, x100 (x5 to special order)
  • Power Supply: 110/120/230/240/250V.AC50/60Hz, consumption 5A.    

About Company

Our clients range from FTSE companies, to large organisations and some small local businesses who are striving to expand.

To see a detailed list of our works and the progress please see our project page.

Cape Town Office

25 Mail Street, Western Province Park, Epping, Cape Town, 7460
+27 21 534 5351
FAX: +27 21 534 3374

Johannesburg Office

Corner of Atlas and Templehof South Road, Bonaero Park, Johannesburg
+27 11 970 7005
FAX: +27 86 678 9360